Wu, H.; Lin, Z.; Song, J.; Zhang, Y.; Guo, Y.; Zhang, W.; Huang, R. Boosting the Self-Trapped Exciton Emission in Cs4SnBr6 Zero-Dimensional Perovskite via Rapid Heat Treatment. Nanomaterials2023, 13, 2259.
Wu, H.; Lin, Z.; Song, J.; Zhang, Y.; Guo, Y.; Zhang, W.; Huang, R. Boosting the Self-Trapped Exciton Emission in Cs4SnBr6 Zero-Dimensional Perovskite via Rapid Heat Treatment. Nanomaterials 2023, 13, 2259.
Wu, H.; Lin, Z.; Song, J.; Zhang, Y.; Guo, Y.; Zhang, W.; Huang, R. Boosting the Self-Trapped Exciton Emission in Cs4SnBr6 Zero-Dimensional Perovskite via Rapid Heat Treatment. Nanomaterials2023, 13, 2259.
Wu, H.; Lin, Z.; Song, J.; Zhang, Y.; Guo, Y.; Zhang, W.; Huang, R. Boosting the Self-Trapped Exciton Emission in Cs4SnBr6 Zero-Dimensional Perovskite via Rapid Heat Treatment. Nanomaterials 2023, 13, 2259.
Abstract
Zero-dimensional (0D) tin halide perovskites feature extraordinary properties, such as broadband emission, high photoluminescence quantum yield, and self-absorption-free characteristics. The innovation of synthesis approaches for high-quality 0D tin halide perovskites has facilitated the flourishing development of perovskite-based optoelectronic devices in recent years. However, discovering an effective strategy to further enhance their emission efficiency remains a considerable challenge. Herein, we report a unique strategy employing rapid heat treatment to attain efficient self-trapped exciton (STE) emission in Cs4SnBr6 zero-dimensional perovskite. Compared to the pristine Cs4SnBr6, rapid thermal treatment (RTT) at 200°C for a duration of 120 seconds results in an augmented STE emission with photoluminescence (PL) quantum yield rising from an initial 50.1% to a substantial 64.7%. Temperature-dependent PL spectra analysis, Raman spectra, and PL decay traces reveal that the PL improvement is attributed to the appropriate electron-phonon coupling as well as the increased binding energies of STEs induced by the RTT. Our findings open up a new avenue for efficient luminescent 0D tin-halide perovskites toward the development of efficient optoelectronic devices based on 0D perovskites.
Copyright:
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